钛精矿内配碳球团定压热容量测试研究

Study on testing of constant pressure thermal capacity for internal carbon pellet of titanium concentrate

针对钛精矿冶炼钛渣过程中钛精矿内配碳球团比热容越高能耗越高的问题,采用正交试验法研究了不同矿煤比、加热温度、造球压力、造球施压时间下钛精矿内配碳球团的比热容变化情况。结果表明,影响钛精矿内配碳球团比热容大小的因素主次顺序为矿煤比、造球压力、加热温度、造球施压时间。确定的最佳工艺参数为矿煤比15%、造球压力18 MPa、加热温度1 100℃、造球施压时间60 s,在此条件下钛精矿内配碳球团的比热容为0.50 kJ/kg·K,可明显降低钛精矿内配碳球团的比热容,能有效降低钛精矿冶炼钛渣的能耗。

In the process of titanium slag smelting with titanium concentrate,the higher the specific heat capacity of internal carbon pellets of titanium concentrate,the higher the energy consumption,and the specific heat capacity changes of carbon-containing pellets of titanium concentrates under different ratios of coal to coal,heating temperature,pelletizing pressure and pelleting pressure are studied using the orthogonal test method.The study indicates that,the main factors affecting the specific heat capacity of carbon-containing pellets of titanium concentrates are ore-to-coal ratio,heating temperature,balling pressure,and balling pressurizing time.The optimized experimental results show that the factors affecting the specific heat capacity of the carbon-containing pellets of the titanium concentrate are in the following order of priorities:the ratio of ore to coal,balling pressure,heating temperature,and balling pressurizing time.The opitimized specific heat capacity of internal carbon pellets of titanium concentrate is 0.50 kJ/kg·K when the ratio of ore to coal is 15%,the balling pressure is 18 MPa,the heating temperature is 1 100 ℃ and the balling pressurizing time is 60 s,which significantly reduces the specific heat capacity of internal carbon pellets of titanium concentrate and effectively reduces the energy consumption of titanium slag in titanium concentrate smelting.